26-02-2015 дата публикации
Номер: US20150054709A1
Принадлежит:
Embodiments relate to systems and methods for a frequency reconfigurable filtenna system. Implementations incorporate a reconfigurable band-pass filter within the feeding line of an antenna structure. The combination of the filter and the antenna may be referred to as a “filtenna”. Implementations integrate both the band-pass filter and the antenna within the same substrate, permitting easier, more efficient and more compact integration in the transceiver hardware. Moreover, by using this configuration, the biasing of the switching elements are not present in the radiating plane of the antenna. This reduces the negative effect of the biasing lines on the antenna radiation performance, as we!! as provides a tunable filtered antenna radiation characteristic. 1. A reconfigurable filtering antenna (filtenna) structure , comprising: a first port to receive a radio frequency (RF) signal and a biasing DC signal, and', 'a varactor, incorporated within a slot in the filter structure; and, 'a reconfigurable band-limited filter, the reconfigurable band-limted filter comprising-'}an antenna element, operatively integrated with the reconfigurable band-limited filter, wherein a band-limited operation of the antenna element is reconfigurable based on the biasing signal applied to the varactor.2. The filtenna structure of claim 1 , wherein the reconfigurable band-limted filter is integrally formed on a same substrate as the antenna structure.3. The filtenna structure of claim 2 , wherein the slot comprises a hexagonal slot.4. The filtenna structure of claim 3 , wherein the varactor is grounded to a ground connection of the substrate.5. The filtenna structure of claim 4 , wherein the reconfigurable band-limted filter is incorporated on a microstrip feeding line of the antenna structure.6. The filtenna structure of claim 5 , wherein the hexagonal slot is formed in the microstrip feeding line as part of the reconfigurable band-pass filter.7. The filtenna structure of claim 6 , wherein ...
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